Sorry, but this is simply just misinformation.

If you were doing "classic" Cocoa in the way it was intended, you wouldn't need to subclass anything for a simple button.

You wouldn't even need to write a single line of code, you'd just instantiate said button in Interface Builder, hook it up to a delegate (e.g. a window controller) and off you go. You can create a hello world example with a handful lines of code.

And even if you'd rather create the button programmatically, it's not much more involved.

Sure, if you're coming from Win32 and expect to program Cocoa without learning Cocoa, you're out of luck. But I guess that applies to all frameworks.